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What do white blood cells (WBC) levels mean from a complete blood count (CBC)?

ANSWER

White blood cells (WBCs) help fight infections. If your complete blood count (CBC) shows you have high WBC levels, it tells your doctor that you have inflammation or infection somewhere in your body. If it’s low, you could be at risk for infection. The normal range is 4,500 to 10,000 cells per microliter (cells/mcL). (A microliter is a very tiny amount – one millionth of a liter).

SOURCES:

Mayo Clinic: “Complete Blood Count (CBC).”

American Association for Clinical Chemistry: “Complete Blood Count,” “Reference Ranges and What They Mean.”

University of Rochester Medical Center: “Complete Blood Count.”

National Heart, Lung, and Blood Institute: “What Do Blood Tests Show?” “What Is Anemia?”

UCLA Health: “Complete Blood Count.”

Reviewed by Louise Chang on December 22, 2018

SOURCES:

Mayo Clinic: “Complete Blood Count (CBC).”

American Association for Clinical Chemistry: “Complete Blood Count,” “Reference Ranges and What They Mean.”

University of Rochester Medical Center: “Complete Blood Count.”

National Heart, Lung, and Blood Institute: “What Do Blood Tests Show?” “What Is Anemia?”

UCLA Health: “Complete Blood Count.”

Reviewed by Louise Chang on December 22, 2018

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What does a red blood cell count (RBC) mean from a complete blood count (CBC)?

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